Micrometer gauge



Jan. 24, 1928.

E. O. WHEELOCK MICROMETER GAUGE Filedv June 18, 1925 2 Sheets-Sheet 2 zzz/ezzfoz';

ETnc 0. (U11/Cewal@ @y MM man Patented Jan. 24, 1928.

unirsi) STATES mennen o.V Wnnnnecn, or accusent),

.more

raronoinnrna GAUGE.

Application filed lnne 18, 1925.

The ordinary micrometer gauge comprises two contacts between which the pal-- to be gauged or measured is placed.` @ne of the contacts is stationary andthe other is adjust-able through a range ot one inch by a screw one inch long. lt is a well known fact that it is extremely difficult to malte a one-inch micrometer screw which is accurate throughout its length. This is due in 19 part to errors in the lead or to a staggered or drunken condition ot the thread.. which owe worse as the thread is lengthened. lvioreover, even it the thread `were accurately made it would he extremely di ncult to maintain the thread in prooer condition, since nearly all micronjieters,`especially those on production work, are used mostly on some particular size. so that excessive wear takes place on a certain part of the screw 2V thread. It is impracticable to take up the backlash entirely at the place where 'such weer has occurred Without making the Iscrew too tight at some other place.

Une ott-he objects oi the presentinven- 25 tion to reduce to a great extent the amount ot movement necessary to be imparted to a microniieter screw. This object is attained by making;` the contact. detachable from the screw and by providing means whereby the ceutact maywbe connected to the screw in various position.7 f one-tenth ot an inch apart. lt will be seen that by providing coarse adjustments by tenths of :r inch, the tine adjustment to hundredths and thousaudths oi an inchy may be obtained by .means ofa n'iicrometer screw havingd a maxiuuun movement ot only onetenth ot an inch. thus eliminating nine-tenths ot the trouble due to error in the lead and to a staggered condition ot the thread. rlhe use ot a short micron'lcter screw also permits usi a coiled compression springF to pre-ss 'net the end oi the screw and thus keep a uniform tension on the thread. thereby efgualizinj the wear and taking up. all hacklash. i l

Oher objects and advantages ot' the in rention will hecome apparent as the descrip tion proceeds. y

.ln the accompanying drawings. Figure i :inental view, on lgreatly enlarged scale. ot micrometer limit snapv aanneembodying' the ieatures ot my invntion.

. i2, 8. 1.5 and 6 are sectional views on lines 2-19.. .5b-B. 5--5. and SW6, respectively of Fig. l.

"l". Qnthe lower end ofthe sleeve l `sleeve i Serial No. 37,883.

Fig. 7 a fraglnental elevation showing the means :tor taking` up wear of the screw threads.

Fig. 8 is a fragmental side elevation of the upper portion or' the device.

Fig. 9 is a fragmental detail view of the Contact spindle.

Figs. l0 and 11 are sectional views taken on lines 10ml() and ll-l1, respectively,` oli'- Fig. l'. Y

Fig. l2 is a tragmental side viewshowing` njieans for preventing rotative displacement of certain parts.

Fig. 13 is a sectional View of the Contact spindle.

*ign 14 is a section on the 0f Fig. l.

Fig. 15 is a fragmental elevation showing the means tor detachably securing the contact indie in position tor movement by the micrometer screw. l

Fig. 16 is a fragmental elevation showing the means for locking the micrometer screw in adjusted position.

The invention is her in shown as embodied ne@ rye-14 in a limit snap gauge of the type disclosed in nfiynpplieation Serial No. 80,426. filed lifl'ay l5. 1925 (now Patent No. 1,639,231, dated August 16, 1927). Only a portion of the lil-shaped body or f 'ame l ot the gauge is shown. The part to he measured or {ranged-is placed between two opposed con` tarts, one oi' which is adjustably mounted in the gauge trame and the other ot which is mounted in alinement with the first `mentioned Contact and arranged to be pressed by a spring; against the part to be gauged. The first mentioned contact 1s not shown 1n the present drawing, as the invention" has no particular reference thereto. The second mentioned Contact is indicated hereinat 2. it consists ofl a cylindrical rod adjustably connected to a structure which is mounted tor reciprocation within a tubular head 3 on the gauge traine. Said reciprocatory structure comprises a sleeve or barrel. `4lmounted in the bore 5 oi the tubular support or head 3, the barrel 4f having at its lowerend an internally threaded opening 6 to receive the threaded upper end ci a. sleeve isan annular tianget (i) having; notches 9 lto receive a tool -for use in screwing the into the barrel 4. A hardened collar l0 surrounds the sleeve 7 and, bears against the )flange 8; Surrounding the re duced upper end 11 of tbe. collar 'lO "a coiled tezpz'ineire .spring 12 rfliieli beurel at its end,I against tbe collar 10 and ngaint au annular tlange 13 extending' into tlie bore ll: will be neen that Vtlie -esjuringg tends to inore downwardly llie sleeves l and i' and tlie Contact Q, and normally liolde tlie louer end ot tbe sleeve l pressed against tlie tlange 13.

Means is provided nllereby the operator may move tbe, sleeves -l and T and the Contact spindle 2 Carried tliereliy, aoaiinst the pres sure ol3 tlie i-prinji` 1Q, to rance Said Contact spindle in order to allor.' the part to be tinged to be `slipped into position between tbe tWo opposed contacte. 'lflie ineens herei in eliou'n for this purpose einnnisea n leerer 14 piroted to tbe gauge traine at 15 and liaring a` rounded surface 1li that bears against .i rounded, relatively tliin edge 1T formed upon tlie sleeve l. de indieoted in Fig. 1, the lever 1l projeetaK into a noteli l?" in tlie lower end ol tbe sleeve il. The aleere structure l and i' is lield against rotational diaplaeenient by ine-ans; ol a key 1T attached to the bead and lying; within o. slot 1T formed in one Side of tbe sleeve il. Said slot is best elioun in Fig. 1Q. The lever lil may be operated in tl'ie inanner Shown in .ny alorer'aid patent or in any otlier preferred way.

Il desired, indicating; ineelianisin oli the forni :shown in the patent liereinbeliore alluded to, or of any other preferred character ,.iay be employed. 'llie ineens for sensing the position of the Contact. o1' for eoinn'iunieating motion iti-oni tbe eontact spindle 2 to the iinlieitiirgl inoelianisin, niay be of any de aired eonetruetion and uiay include a eonlaet lever 18 pivotally mounted in tbe gauge frame at 10 and baring; a rounded surta -e .20 Wliieli lirain Contact witli a rounded, relatively tliin edge 21 liorn'ied at tlie lower end oil a `Qlot l in the collar 10. ils shown in 1, the end ol? tbe lever 18 projects into the slot 22. Tlie collar 10 is lleld against rotationalv displacement by means of a pin Q3 carried by said collar and projecting into a. groove :2l liorined in the lower end of the tubular liead 3.

A ineuna of adjusting tbe position of tlie pointer on llie indicatingl dial is provided by Changing;- llie position ot' tbe sleeve T in the threaded opening;` This is accomplished by inaerting a Spanner Wreneli or other Siinilar tool in tbe apertures 9 in tbe annular flange 8, and turning' it in the direction reA quired.

The eoulart spindle 2 is Connected to tbe reeiproeatory Sleeve structure Ll and 7 by ineana which permite a Coarse adjustment of tbe poeition ot the Contact spindle to be made quiekly. means also being employed to permit a line adjustment of the Contact spindle to tlie desired position. The connectingl nieane allor-ding suoli :uljustinente of the conu tact spindle Witli reterenee lo tbe Sleeve Structure Ll and T comprit-:ee n. sleeve Elli tln'ougili Wliieli tlie eontact spindle extends. ',lflie sleeve 2 is prorided willi un external annular alioulder 2o by rigidly :i-eeuring to d sleere an eneirelin Sleeve Ql by menus ol a pin ill. The aleere :.ti lite elidably witliin the barrel l. 'llie sleeve fifi is conneeted to tbe barrel il i'or line :uljuatnlent by inefina ineluding; :i lulnilar inirronuzter aereu' ltz uliirli nnrrounda tlie eleere :lo and beara at one ond auuinffst ille boulder :35th The eri-eu' enga 1 lie internally aerow-lln-eud ed portion 2li ol tbe barrel fl. il rolled env puniiro ffipringr lll f-nirrounde4 llie contact lapindle and lies between :in internal annu-- lar elioulder 3l near tlie lower end ot tbe barrel l and tbe lower end ol' llie sleeve Strrnrture and Ell. lt u'ill be .eeen ll'iulJ tbe api-ino' Il. fierros to bold tbe Shoulder 25" pref4 ed against the lower end ol tlie adjuntingi' :Hort-.w Qd,

Vlll'ie sleeve Strutture E25) and illli bold atfainat rotntional displacement by ineani-i of a plate or ltey 32 feeured lo the lower portion oli' tbe, eleero atrutdinfe and Ell by ineane oli u. euren' 33. r.lille ltey l2 lien n'itliin the, ltnnrituflinal elot 1T lorined in tlie burrel el.

lleane provided nliereln.l tlie position of llie adjuntinp; euren' willi ie'lerel -o to tlw barrel l inn be readily observed. Suid nieans eoinpriees u tliiinble 35. llle upper end ol? irliieli rigidly secured lo ille upper end ol tbe eieren' 2S, aa by riveting.

'l`lie tliilnble 35 lita rotatably upon tlie bar rel 11- and its'` l'iereled lower end it urzulualed (ne eliou'n in llifr. to indirale tbe erlenl olE rotation olE llu inieroulelei errer.: ,lllae inierrnneter euren' ll llaa Yloi'lr llu'ead-z'onm lutiona per ineli, ("itiluillu` `lurflinfl llie lari' 4l tliat lliir. 'l drawn upon a large Heule, il is; innn'znftieable to illuatrale toi-ty threadeourolntions:` per ineli. lienee un lo tliia l'eature of the derive llie illualrulion itJ nui'ely diagrannnatie.) (Jue revolution ol tbe nai eroineter .erre and tbe allaffluui lliilnble Ili tlierelore .n'iovee tbe contact spindle one! lorlietli or twenty-lire one-tlionsuinlilla oll an ineli. One twenty-[lith olt :i reroluton ol tbe niieronuiter Soren' `would therefore more tbe eontaet Spindle ouedlumaandlll ol nn ineli. (loueetgluntly tlie berelrd loner und ol llie lliiinble -l is e'rzuluated to indirette twenty-titille ot a revolution. Vlie barrel `l ie: provided Willi a Zero line ill?. and is `nrad uated longitudinally. an :it lT. lo ilulieute tortietlis of an ineli. (lre eoiuj'alele revoluttion of tlie tliiinble fll' and llie niieroinelel serew 2S will more tbe lon'er end ol tl'ie tliiinble from one graduation 21T to tlie` next.

rleana in proiled lor rotatingtlie inieronieter seien' and lockingV il. in udjureiled l o o lill Lesage? position. lVhile suchmeans may partake ot' various forms, it is herein shown as comprising; a knurled sleeve 88 .itting slidably upon the thimble and having a longitudinal extending' hole $39 to slidably receive a pin 40 fined to the micrometer screw 25? and the thimble he sleeve carries a pin 4l havingv a conical end adapted to engage serrations (Figs. 2 and i6) iormed `Lipton the lower side or a, collar 43. Said collar is rigidly secured to the sleeve 25 by means ot a nutvvh'ich clamps the collar against an annular flange elo on the sleeve E25. A. coiled expansive spring a6 interposed between the micrometer screw andan internal flange if? on the lrnurled sleeve 38 yieldingly holds the locking pin Lll in engagement with the serrated surface of the collar 43, There are twenty-live tooth spaces in the lockingl collar 4:3, hence the micrometer screw 2S may be locked in positions representing adjustments ot one onethonsandth of an inch.

vIn order to talee up Wear nl' the microln eter screiv 28 andthe screw-threaded portion ot the barrel et I provide means Which, While it may be ot any desired character, consists preferably ol" al tapered ring 48 lyingbetiveen the thimble 35 and the tapered upper end of the barrel 1. The` upper end of said barrel is slotted, as indicatedvat t9 in Figs. 5 and 7, so that the screw-threaded portion of said barrel may be contracted into proper engagement with the micrometer screw by forcinirthe tapered ringl 48 downwardly to the necessary extent.

The means ilor connecting the contact spindle 2 to the sleeve 25 is of such character as to permit ot' quick adjustment of the contact spindle through a distance of one-tenth ot' an inch `or multiples ot such distance. ln the embodiment herein shown ot the invention1 said means comprises a pin 5() attached to the sleeve and having' a tapered end adapted to enter any one ot ten` correspoi'idingly tapered openings 5l ar- 'angred alongtbe length ott the contact spn dle 2 at intervals. of one-tenth of an inch. In order that the contact spindle 2 shall be readily `disengageable 'trom the connecting pin 50. the openings 51 merge'at one end into a longitudinal 2(groove or channel 52 'formed in the contact spindle (see Fig. 9). la order that the connecting pin 5t) may be wedged in the openings 51 so that the contact spindle 2 may be locked in registering position, said openings are in the 'form olf transverse grooves cut eccentrically of the contact spindle,` as indicated in Fig. 13. As the grooves 5l entend away from the channel 52 they become narrower due to their eccentric torinatiorn as shown in l5.

In other Words, the side walls` oi:1 each groove 5l approach each other as they recede irom the channel 52, thus constituting a Wedge-shaped opening into which the tapered pin 5t) may be forced by turningv the contact spindle 2 in the direction to carry the channel 52 out o'l registerrwith the pin. On the exposed upper end of the Contact spindle 2 is a longitudinal series oit gradua-- tions 53 representing` tenths o'lE an inch. The ripper end ol' the sleeveb serves as a zero or datum line. Assuming the present invention to be embodied in limit snap gauge having an indicatingdial as disclosed in my said Patent No. ltll. the mode oi adjustment and use as lolloivs: The Contact 2 should be brought against the aforementioned adjustable contact Which is 'loc-ated in opposition to it, and the zero line on the thimble 35 should be brought in enganement With the zero line on the barrel t. lfliith the parte in this position it is possible to vary the position oi the pointer on the indicating dial. By retterringI to the previously mentioned patcnttlxe .method ol adjusting this pointer will be apparent. It is briefly noted that the aforementioned adjustable Contact (not shown) is moved in the direction required to bring; the pointer to Zero. @nce the various mcciianirnns are all indicating` Zero, it should not be necessary to make the foregoing` adjustments, except at long intervals.

One ot the advantages ot' the micrometer construction shoivn herein, over the gauge in the ai'orementnmed patent, is that it may be positioned Without the use ot a master block, or the use oi the part desired to be i duplicated. ln lieu of this, the micrometer is merely set so as to give the desired readings, and then the gauge isk ready for use. The part to be tested is then placed between the contacts, the contact spindle 2 being ivitl'idraivn slightly to receive such part by means ol the lever M. releases the lever l-l the sining l2 presses the contact spindle 2 against the part toibe gauged` a variation ol" said part above or beloiv the desired dimension being indicated by the position oi" the pointer.

The operation oi the micrometer as herein disclosed is as `follows:

The kcontact spindle 2 is moved toward or away trom the opposed contact to the de sired distance Within one-tenth ot an inch, and locked in such a position by Wedgiug the pin in the proper groove 5l. lt. lor example, tbe gauge is to be set to measure a dimension oi: .-4151 oi au inch, the contact spindle 2 is adjusted to bring the graduation marked fl on `said spindle. into register With the upper end ot tbe sleeve 25. The knul-led sleeve 355 is tten pressed doivnivardly to disengage the locking pin from the `serrations i@ on the collar 4?), andqsa-id knurled sleeve is rotated through tivo revo-` lutions in the reverse direction, the spring 30 keeping the shoulder 25a pressed against Wlheu the operatorV iso the end ot tbe micrometer serew E28. 'lln'o rei'olutiims ot tlie screw 28 retrncts tbe eon tiret spindle titty onetiiousnndtl1s ot' un ineli. The micrometer' screw if; tlien rotnted to bring the lirst ornduntion beyond tbe zero line on the tliimble 35 into register with tbe Zero line on tlie bnrrel l. u'lflerebjii tbe contnetl spindle Q is retriieted nnotlier one-tliousniultb oi" on inelie tlius nl ueinej tbe Contact spindle ?-I'i'l ot un ineb uwer trom tbe opposed eontzot.

It n'ili be seen tlnxt. bj: tbe eoiietriuftiou iierein disclosed tlie errors due to initiol inaccuracies :ind n'eu ot tlie mierometer ferrer.' nre grezitlj; reduced: tluit tile number ot turns required in iuljusting tlie moi'nble oontfiet through its maximum rentre reduced from forty to tour` tbe lo 'reuter portion ot the adjustment beine` quickly ebtsiin-ed by menus et the adjustable connection between the Contact spindle und tlie Steeve und thettlie desired tine tidjiui'ment bj. ineens of the micrometer screw QS is deliniteliv de termined through tbe ene'uejeinent ot the locking pin il with the :se ted looking eollar 43. The menus just ro, rred to tor setting und locking',r the micrometer sererc in adjusted position ut exact tliouffindtis; ot en inch, when used in eonn( on o dini rondiner to ten tliousurnltlis oi :in ineli, plus or minus, us disclosed in my siii d rmtent, eliminates tlie time find skill required to set und rend ten tliousnndtiis oif en ineli by tlie Vernier metliod used on the ordinnifr micrometer end in which the reudings ot two persons seldom. it even agree.

lith tlie improvements herein disclosed all ot tlie doubtful points irliicli nre o source ot endless disputes und arguments when tbe ordinurT mierou'ieter end snep und limit gauges :ire used, ure resoired to n eertninty. As n result, measurements mode by :my number ot persons ure bound to agree, tbe average person with no experience or skill in suoli matters obtaining' tbe seme results ns tbe most skilled and experienced.

1iVbile tlie invention luis been herein shown as embodied in e snep gouge, itV will be understood tlrut it is applicable to other types ot gauges. Moreover, tbe detailed description ot tlie present construction lnis been given tor the purpose ot imi'uirtine n clean umlerstzuulingj ot tbe intention und not tor the purpose o' limiting; tbe invention to tlie details sliou'iu tlie scope ot tbe intention bein` indicnted iu the nppend Ll elniiris. Vliile tlie instrument is bei-ein sliou'n ns griiduuted in decimnls ot inelies, it will be evident tlint it might be grzidnoted on tbe metric system.

lr. elainl as my intention:

i. A mierometer gouge bovine', in eombination, :i tubular support7 n borrel siidzibly but nonrotntubly mounted in seid. support, a, sleeve having e screw-thread. engagement- Moneum with the tower end ot :fold bnrreL seid tubuler suni'iort burin@r on. interrnd ibmige, u roiied eijinnsire springt iritbiu seid tubuiiir support and benriugr :it its ends utegfiinsif said sleere nud seid .linneo und serving' normally to liold tlie ion'er end ot tlio bziri'ei neninst seid tienne. u, seeond sleeve siidobhi but non-rotoizmir u'nuioted 'nitbin seid bro'rel, reid eeoud sleeve lniriugr nu erteruni elioulder. :i (ubulnr niif'rometer sieren' benrinir eejninst unl sbouider. :i coiled erpnnsire siirinu niibin tbe lower portion ot seid bnr roi und beffriiigf :ie-:liefst tbe i-:eeond sieeve to bold seid i-luiulder :io-"duet tbe oud ot seid screw. seid serein' eue'i fue tbe upper si ewtlireuded portion ot und borrel, :i iliimbie seeured to seid erreur und .surrouiulinir seid borrel. tbe b'iu'er end olf @uid tbiinbli?4 beim;` tieriiilierulijr urnduntod to indicuie tlzioilsruidtlis :uid ilse borrel bni'inej n, :cero line tu eonrt 'u'ib smid froduutioni Quid zero line j lmigritinliouilji' iji-:iiiioitrui iu dirisiilms ot tn'efirotire one-tbousundst :i tbird stoere iuirrouiufliiur mid tliimble und iellidnbilrV but .non-rotntrildr eornieeted therewith, e ser- 'oted loeld eollur lined to tbe seeond stoere. :i loifl ie' pin on tlie tiiird stoere eje Suid serrntions, n coiled ertoeusire interner-sed between tile sieren' und tlio third sleeiiJ 'lor juieldingrly boldiw @uid olii in euiiinuunent with tbe i. roted rollio', 1i eoi'ineetinej ein zittueiied to tbe seeonrfl slr-ere, und n eontiict spindle lieringr :i lougritiu nul elnuiuel to reeeire seid eouueigting); nin. tliere beine; :i lonegitudinnl serie l. o t eruiididnut opening-.s in snid spindle meri' i in seid eluinuei, seid pin beiner to enter und become wedged in :luy

id oi'ieuiugrs.

it. micrometer iunior: boring', iii combination. :i borrel.. :i sleeie slidiib'liY but non rototiibljr mounted niiliin .seid bnrrei. sold sleere lini'ine; nu order-nul slioulde :i tubulair inierometer sereir benriugr zie'uinst .seid shoulder, u eoiled expensive sgirinej uitbin tbe lower `portion olV seid borrel :ind benrinif ueiiinst seid stoere to bold seid slmuldor h`t tlie end ot seid sieren. seid Sfr-reir enguur tl'ie upper sereuhtliresided portion ot sziid borrel, :i tlrimble seeured to smid sei-eu' und surrouiuline seid borrel. tbe louer und ot seid tiiinible beine" ooriiiliernllr insolented to indicfute tluiuisundtlis und tbe borrel lruriru u zero line to roert u'itli snid erodontions, seid ,'ero line beinea lourgiudinai'llr grrnduuted in dirieions o t tu'onlr-iiri ouetliousundtlis menus to loci: tbe veren' iu zul justed position, und :i eontziei soindlo boron; an zuljustnbe eonnectir'ui with ibo werner.

3. A micrometer nuire boring', iu ronibinotion, :i bui-rel, n sleeve slidnblr but nonrotntziblr mouiited uiitliin soul borrel. nid sleeve lniii'inej un externe! slioulf'ier, :i tubulnr micrometer screw beziringnireiust snid ,'-iiouledeiiteiil to ou i der7 n coiled expensive spring; within tire ilu lori

lower portion ot" said barrel and bearing against said sleeve to hold said shoulder against the end of said screw, said screw enthe upper screw-threaded portion of said barrel, a thiinble secured to said screw and surrounding said barrel, the lower end of said thiinhle being peripherally graduated to :indicate thousandths and the barrel having a zero line to coact with said graduations, said zero line being longitudinally7 graduated in divisions of twenty-five onethousandths, and a contact arranged to be moved by the screw.

el, A micrometer gauge having, in cominnation, a tubular support, a barrel slidably but nonrotatably mounted in said support, a sleeve having a crew-thread engagement with the lower end of said barrel, said tubular support having an internal flange, a coiled expansive spring within said tubular support and bearing at its ends against said sleeve and said flange and serving normally to hold the lower end of the barrel against said flange, a lever engaging said sleeve to sense the position thereof, a lever engaging said barrel to.` move the latter against the action of the spring, a micrometer screw engaging the upper screwthreaded portion of said barrel, a thimble secured to said screw and surrounding said barrel, the lower end of said thimble being peripherally graduated toi indicate thousandths and the barrel having a zero line to coact with said graduations, said zero line being longitudinally graduated in divisions of twentyeve one-thousandths, and a contact arranged to be moved by the screw.

5. A micrometer gauge having, in combination, a screw, a tapered pin associated with the screw to move therewith, and a contact spindle having a longitudinal channel in which said pin may move, there being a series of 'equidistant locking openings arranged along said channel and merging therein,l said pin being adapted to enter any of said openings, each of said openings consisting of an eccentrically formed groove having inclined sidewalls conforming to the taper of the pin.

G. A micrometer gauge having, in combination, a screw, a pin associated with the screw to move therewith, and a contact spindle having a longitudinal channel in which said pin may move, there being a series of equidistant locking openings arranged along said channel and merging therein, said pin being adapted to enter any ci? said openings.

7. A micrometer gauge having, in combination, a screw, a pin associated with the screw to move therewith, and a contact spindle hav* a longitudinal series of equidistant loc!V g openings to receive said pin, said spindle being engageable with and disengageable from said pin by rotative movements of the spindle.

8. A cylindrical contact spindle for a micrometer' gauge, said spindle having a longitudinal Groove and a series of locking openings at one side of the groove, said openings communicating with the groove, and each opening tapering away from the groove.

ln testimony whereof, I have hereunto atlixed my signature.

ERNEST O. WHEELOCK.

CERTWCTE Granma?, zmuary 24, i928, to

Paten Na. 65(i 927,

f page line 84, :md 5, for the ion o n ma pme specicat iied tha effe? appeas i mes for "Na i., 639, 231" read "NQL E? 639 word "cmg mdna" a'ea "magi m 4, for sc1-hed"; and m the Said the wmpmmd Wod "crew-thread" Leters Paem'; should be read w' l fms@ @Mmmmm e'en tha the same may conform io the recr z @fw mi ice,

Sigaed and sealed his Zs day @i Eebary, A.

hssner @i Patents.

Seal, 

